CN102839919A - Drill pipe of engineering driller - Google Patents
Drill pipe of engineering driller Download PDFInfo
- Publication number
- CN102839919A CN102839919A CN2011101671315A CN201110167131A CN102839919A CN 102839919 A CN102839919 A CN 102839919A CN 2011101671315 A CN2011101671315 A CN 2011101671315A CN 201110167131 A CN201110167131 A CN 201110167131A CN 102839919 A CN102839919 A CN 102839919A
- Authority
- CN
- China
- Prior art keywords
- oil
- drilling rod
- depression bar
- cylinder
- distributing pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
A drill pipe of an engineering driller comprises a power driving plate, a drill pipe, a press frame, a drill pipe fixing ring, two lifting oil cylinders, an underframe and a hydraulic system; the drill pipe of the engineering driller is characterized in that the upper part of the drill pipe is provided with a mounting flange; the press frame is positioned above a driving sleeve; the drill pipe penetrates through a hole of a drill pipe press frame; the mounting flange of the drill pipe is fixedly mounted on the upper end surface of the drill pipe press frame; the drill pipe fixing ring is mounted in a sleeving manner at the upper part of the drill pipe, which extends out of the end surface of the mounting flange; the two lifting oil cylinders are fixedly mounted on left and right sides of the underframe in a vertical and symmetric way; piston rods of the two lifting oil cylinders are connected with the press frame; piston rods of two press rod oil cylinders are connected with press rods; a hand-directional valve in the hydraulic system can be used for changing the flowing direction of hydraulic oil, so that the piston rods of the lifting oil cylinders are pulled downwards and jacked upwards; the piston rods of the press rod oil cylinders extend out and retract, so as to respectively apply a pressure to the press frame and release the pressure of the press frame; and the drill pipe is used for drilling in pressurized and normal states; and according to the invention, through the adoption of a drill pipe fixing ring structure, the stability and drilling capability of the engineering driller in operation are improved, the construction efficiency of the driller is increased, and the construction progress is reduced.
Description
Technical field
The present invention relates to a kind of drilling rod, more precisely, relate to a kind of engineering driller drilling rod.
Background technology
In highway, railway, bridge, highrise building, harbour and dam were built, pile foundation construction adopted the large-section in-situ concrete pile construction in a large number, and the large-diameter bored pile engineering the drilling has been had the further market demand at present.Such engineering driller of prior art is in the drilling tool drilling process; Increase the energy that engineering driller bores the layer that picks up through drilling rod weight, drilling tool assembly and the drill bit weight that relies on rig; But; The drilling rod of the engineering driller of this structure from great, to bore pick efficient lower, particularly bores when running into hard lithosphere in the pick process, can only be by changing expensive drill bit, or buying the rock breaking capacity that more powerful engineering driller solves rig; Cause use cost high to unit in charge of construction like this, influence construction operation efficient.
Summary of the invention
Continuous development along with pile foundation engineering; Because the diversity of construction and the complexity on stratum; Engineering driller has been proposed higher brill pick performance requirement, and original engineering driller can not satisfy the construction requirement of big diameter borehole construction and hard lithostratigraphy, and the downward brill that therefore must increase drilling rod is dug ability; And require to increase simultaneously the driving stability of drilling rod, thereby fully guarantee engineering driller stable, reliable and higher operating efficiency in boring the pick process.
For reaching above purpose, the solution that the present invention adopted is:
A kind of engineering driller drilling rod; Comprise power drive dish, drilling rod, pressure frame, contain the drilling rod retainer plate of floating bearing, two handling oil cylinders, underframe and hydraulic systems, wherein: the pressure frame comprises the pressing frame body with installing hole, drilling rod pressure frame, depression bar and two the depression bar oil cylinders that contain floating bearing; It is characterized in that: said power drive dish is positioned on the underframe, and one of which end connection power source, and the other end is provided with the actuating sleeve that passes underframe front end endoporus; Said drilling rod top has mounting flange, and its underpart places in the actuating sleeve; Said pressure chord position is in the top of actuating sleeve; Said pressing frame body is a welding structural element, and its left and right sides is provided with the boss of symmetry; The top of said boss is provided with cylinder; Said drilling rod presses frame to be installed in the installing hole of pressing frame body; The hole that drilling rod is pressed frame is passed on said drilling rod top, and makes the mounting flange on its top press the upper surface of frame to be fixedly connected with drilling rod; The cylinder barrel of said two depression bar oil cylinders is installed in the outboard end of cylinder; Said depression bar places in the hole of cylinder and with the piston rod of depression bar oil cylinder and is connected; Said drilling rod fixed trap is contained in and is positioned at the drilling rod top of stretching out on the mounting flange end face; Said two lift cylinders are installed in to vertical symmetry the left and right sides of underframe respectively, and its cylinder barrel and underframe install, and its piston rod is connected with the boss of pressing frame body through bearing pin; Said hydraulic system comprises hydraulic oil container, hydraulic pump, oil inlet pipe, oil return pipe, depression bar oil cylinder and handling oil cylinder control loop, and wherein, said hydraulic pump is connected with hydraulic oil container pressure oil pump is given overvoltage rod oil cylinder and handling oil cylinder control loop.
The present invention can be; Said depression bar oil cylinder and handling oil cylinder control loop comprise hand-operated direction valve, are connected in the import position of hand-operated direction valve and first oil distributing pipe and second oil distributing pipe that first one way valve on the oil inlet pipe between the hydraulic pump, first working tubing, U-shaped connect; First working tubing is connected first oil distributing pipe that the first outlet position of hand-operated direction valve is connected with U-shaped and second oil distributing pipe mid point as entrance point; The port of export of first oil distributing pipe and second oil distributing pipe is connected the big chamber of two depression bar oil cylinders respectively; Second working tubing is connected the 5th oil distributing pipe that the second outlet position of hand-operated direction valve is connected with U-shaped and the 6th oil distributing pipe mid point as entrance point; The 5th oil distributing pipe and the 6th oil distributing pipe are connected the big chamber of two handling oil cylinders respectively as the port of export of the mid point of entrance point; Two second one way valves, connect the 3rd oil distributing pipe and the 4th oil distributing pipe of depression bar oil cylinder and handling oil cylinder loculus separately; Said second one way valve is connected on the depression bar oil cylinder between the 3rd oil distributing pipe and the 5th oil distributing pipe and the 4th oil distributing pipe and the 6th oil distributing pipe, and depression bar oil cylinder and handling oil cylinder loculus are communicated with.
The present invention can also be; Said depression bar oil cylinder and handling oil cylinder control loop also are included in the oil return pipe that the manual reverse of direction valve outlet port is connected and are back to second overflow valve of installing on the hydraulic oil container pipeline; And first overflow valve of on big chamber to the hydraulic oil container pipeline of two handling oil cylinders, installing, with set pressure.
The present invention can also be; Said two depression bar oil cylinders are in big chamber during pressurized; Depression bar stretches out cylinder and pushes down the drilling rod retainer plate, opens second one way valve that is arranged in the depression bar oil cylinder simultaneously, and hydraulic oil flow is to the loculus of two handling oil cylinders; The piston rod of handling oil cylinder shrinks tension and compression frame down, so that drilling rod is in the pressurized state that creeps into downwards.
The present invention can also be; During pressurized, the piston rod of handling oil cylinder stretches out the top to said two handling oil cylinders, the loculus of two depression bar oil cylinders of hydraulic oil entering in big chamber; The piston rod of depression bar oil cylinder shrinks; Depression bar retraction cylinder breaks away from the drilling rod retainer plate, to pressing the frame release pressure, so that drilling rod is in the normal condition of creeping into downwards.
The present invention can also be, is provided with the torsion pass bar of even layout in the hole of said actuating sleeve, and drilling rod bottom cylindrical is provided with the groove with torsion pass bar relative engagement.
The present invention can also be, the head of said depression bar is provided with breach, and breach is pressed in the upper surface of drilling rod retainer plate when stretching out.
Engineering driller drilling rod of the present invention efficiently solves the technical problem that the pick performance is bored in existing engineering driller lack perseverance pressurization; The construction needs that can adapt to complicated, harder lithosphere geology; Effectively the bore operation efficient of engineering driller shortens construction speed, has high economic and commercial firm's benefit.
Engineering driller drilling rod of the present invention has following good effect and advantage:
1, according to the present invention, adopt drilling rod retainer plate latch-up structure, simple in structure, safe and reliable, effectively improve the stability that drilling rod bores the pick operation.
2, according to the present invention; Remove and to satisfy engineering driller and under normal condition, creep into digging, and can guarantee effectively that drilling rod creeps into digging under pressurized state, increase the ability that engineering driller bores the pick lithostratigraphy; Effectively improve the operating efficiency of engineering driller, shorten construction progress.
Description of drawings
Fig. 1 is an engineering driller jackrod structure sketch map of the present invention;
Fig. 2 is the HYDRAULIC CONTROL SYSTEM sketch map of engineering driller drilling rod of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
A kind of engineering driller drilling rod; Comprise power drive dish 1, drilling rod 2, press frame 3, contain the drilling rod retainer plate 4 of floating bearing, two handling oil cylinders 5, underframe 6 and hydraulic systems 7, wherein: the pressing frame body 31 with installing hole of pressing frame 3 to comprise, the drilling rod that contains floating bearing are pressed frame 32, depression bar 33 and two depression bar oil cylinders 34; It is characterized in that: said power drive dish 1 is positioned on the underframe 6, and one of which end connection power source, and the other end is provided with the actuating sleeve 11 that passes underframe 1 front end endoporus 61; Said drilling rod 2 tops have mounting flange 21, and its underpart places in the actuating sleeve 11; Said pressure frame 3 is positioned at the top of actuating sleeve 11; Said pressing frame body 31 is a welding structural element, and its left and right sides is provided with the boss 311 of symmetry; The top of said boss 311 is provided with cylinder 314; Said drilling rod presses frame 32 to be installed in the installing hole of pressing frame body 31; The hole 321 that drilling rod is pressed frame 32 is passed on said drilling rod 2 tops, and makes the mounting flange 21 on its top press the upper surface 322 of frame 32 to be fixedly connected with drilling rod; The cylinder barrel of said two depression bar oil cylinders 34 is installed in the outboard end of cylinder 314; Said depression bar 33 places in the hole of cylinder 314 and with the piston rod of depression bar oil cylinder 34 and is connected; Said drilling rod retainer plate 4 is sleeved on and is positioned at drilling rod 2 tops of stretching out on mounting flange 211 end faces; Said two lift cylinders 5 are installed in to vertical symmetry the left and right sides of underframe 6 respectively, and its cylinder barrel 51 installs with underframe 6, and its piston rod 52 is connected with the boss 311 of pressing frame body 31 through bearing pin; Be provided with the torsion pass bar 111 of even layout in the hole of said actuating sleeve 11, drilling rod 2 bottom cylindricals are provided with the groove 22 with torsion pass bar 111 relative engagement; The head of said depression bar 33 is provided with breach 331, and breach 331 is pressed in the upper surface of drilling rod retainer plate 4 when stretching out; Said hydraulic system 7 comprises hydraulic oil container 70, hydraulic pump 71, oil inlet pipe 73, oil return pipe 80, depression bar oil cylinder 34 and handling oil cylinder 5 control loops; Wherein, said hydraulic pump 71 is connected with hydraulic oil container 70 pressure oil pump is given overvoltage rod oil cylinder 34 and handling oil cylinder 5 control loops; Said depression bar oil cylinder 34 and handling oil cylinder 5 control loops comprise hand-operated direction valve 74, be connected in first one way valve 72 on import position and the oil inlet pipe 73 between the hydraulic pump 71 of hand-operated direction valve 74, first working tubing 75, U-shaped connect first oil distributing pipe 751 and second oil distributing pipe 752; First working tubing 75 is connected first oil distributing pipe 751 that the first outlet position of hand-operated direction valve 74 is connected with U-shaped and second oil distributing pipe 752 mid point as entrance point; The port of export of first oil distributing pipe 751 and second oil distributing pipe 752 is connected the big chamber of two depression bar oil cylinders 34 respectively; Second working tubing (78) is connected the 5th oil distributing pipe 771 that the second outlet position of hand-operated direction valve (74) is connected with U-shaped and the 6th oil distributing pipe 772 mid point as entrance point; The 5th oil distributing pipe 771 and the 6th oil distributing pipe 772 are connected the big chamber of two handling oil cylinders 5 respectively as the port of export of the mid point of entrance point; Two second one way valves 76, connect the 3rd oil distributing pipe 761 and the 4th oil distributing pipe 762 of depression bar oil cylinder 34 and handling oil cylinder 5 loculuses separately; Said second one way valve 76 is connected on the depression bar oil cylinder 34 between the 3rd oil distributing pipe 761 and the 5th oil distributing pipe 771 and the 4th oil distributing pipe 762 and the 6th oil distributing pipe 772, and depression bar oil cylinder 34 and handling oil cylinder 5 loculuses are communicated with; Said depression bar oil cylinder 34 and handling oil cylinder 5 control loops also are included in the oil return pipe 80 that hand-operated direction valve 74 outlets are connected and are back to second overflow valve of installing on hydraulic oil container 70 pipelines 83; And first overflow valve of on big chamber to hydraulic oil container 70 pipelines of two handling oil cylinders 5, installing 82, with set pressure.
Embodiment 1:
Hand-operated direction valve 74 moves up; Hydraulic pump 71 is taken from the hydraulic oil in the hydraulic oil container 70; To the big chamber of two depression bar oil cylinders 5 hydraulic oil is provided through first one way valve 72, oil inlet pipe 73 and hand-operated direction valve 74, first working tubing 75, first oil distributing pipe 751, second oil distributing pipe 752; Depression bar 33 stretches out cylinder 314 and pushes down drilling rod retainer plate 4, and when the big cavity pressure oil of two depression bar oil cylinders 5 reached second one way valve, 76 opening pressures, hydraulic oil got into the loculus of two handling oil cylinders 5 through the 3rd oil distributing pipe 761, the 4th oil distributing pipe 762; The piston rod 52 of handling oil cylinder 5 shrinks tension and compression frame 3 down, and drilling rod 2 creeps into digging downwards under pressurized state.
Embodiment 2:
Hand-operated direction valve 74 moves down; Hydraulic pump 71 is taken from the hydraulic oil in the hydraulic oil container 70; To the big chamber of two handling oil cylinders 5 hydraulic oil is provided through first one way valve 72, oil inlet pipe 73 and hand-operated direction valve 74, second working tubing 79, the 5th oil distributing pipe 771, the 6th oil distributing pipe 772, top on the piston rod 52 of handling oil cylinder 5, hydraulic oil gets into the loculus of depression bar oil cylinders 34 in the loculus of the oil cylinder of handling simultaneously 5 through the 3rd oil distributing pipe 761, the 4th oil distributing pipe 762; The piston rod of depression bar oil cylinder 34 shrinks; Depression bar 33 retraction cylinders 414 break away from drilling rod retainer plate 4, and to pressing frame 3 release pressures, drilling rod 2 creeps into digging downwards under normal condition.
Claims (7)
1. engineering driller drilling rod; Comprise power drive dish (1), drilling rod (2), press frame (3), the drilling rod retainer plate (4) that contains floating bearing, two handling oil cylinders (5), underframe (6) and hydraulic system (7), wherein: pressure frame (3) comprises the pressing frame body (31) with installing hole, drilling rod pressure frame (32), depression bar (33) and two the depression bar oil cylinders (34) that contain floating bearing; It is characterized in that: said power drive dish (1) is positioned on the underframe (6), and one of which end connection power source, and the other end is provided with the actuating sleeve (11) that passes underframe (1) front end endoporus (61); Said drilling rod (2) top has mounting flange (21), and its underpart places in the actuating sleeve (11); Said pressure frame (3) is positioned at the top of actuating sleeve (11); Said pressing frame body (31) is a welding structural element, and its left and right sides is provided with the boss (311) of symmetry; The top of said boss (311) is provided with cylinder (314); Said drilling rod presses frame (32) to be installed in the installing hole of pressing frame body (31); The hole (321) that drilling rod is pressed frame (32) is passed on said drilling rod (2) top, and makes the mounting flange (21) on its top press the upper surface (322) of frame (32) to be fixedly connected with drilling rod; The cylinder barrel of said two depression bar oil cylinders (34) is installed in the outboard end of cylinder (314); Said depression bar (33) places in the hole of cylinder (314) and with the piston rod of depression bar oil cylinder (34) and is connected; Said drilling rod retainer plate (4) is sleeved on and is positioned at drilling rod (2) top of stretching out on mounting flange (211) end face; Said two lift cylinders (5) are installed in to vertical symmetry the left and right sides of underframe (6) respectively, and its cylinder barrel (51) installs with underframe (6), and its piston rod (52) is connected with the boss (311) of pressing frame body (31) through bearing pin; Said hydraulic system (7) comprises hydraulic oil container (70), hydraulic pump (71), oil inlet pipe (73), oil return pipe (80), depression bar oil cylinder (34) and handling oil cylinder (5) control loop; Wherein, said hydraulic pump (71) is connected with hydraulic oil container (70) pressure oil pump is given overvoltage rod oil cylinder (34) and handling oil cylinder (5) control loop.
2. a kind of engineering driller drilling rod according to claim 1; It is characterized in that said depression bar oil cylinder (34) and handling oil cylinder (5) control loop comprise hand-operated direction valve (74), are connected in the import position of hand-operated direction valve (74) and first oil distributing pipe (751) and second oil distributing pipe (752) that first one way valve (72) on the oil inlet pipe (73) between the hydraulic pump (71), first working tubing (75), U-shaped connect; First working tubing (75) is connected first oil distributing pipe (751) that the first outlet position of hand-operated direction valve (74) is connected with U-shaped and second oil distributing pipe (752) mid point as entrance point; First oil distributing pipe (751) and the port of export of second oil distributing pipe (752) are connected the big chamber of two depression bar oil cylinders (34) respectively; Second working tubing (78) is connected the 5th oil distributing pipe (771) that the second outlet position of hand-operated direction valve (74) is connected with U-shaped and the 6th oil distributing pipe (772) mid point as entrance point; The 5th oil distributing pipe (771) and the 6th oil distributing pipe (772) are connected the big chamber of two handling oil cylinders (5) respectively as the port of export of the mid point of entrance point; Two second one way valves (76), connect the 3rd oil distributing pipe (761) and the 4th oil distributing pipe (762) of depression bar oil cylinder (34) and handling oil cylinder (5) loculus separately; Said second one way valve (76) is connected on the depression bar oil cylinder (34) between the 3rd oil distributing pipe (761) and the 5th oil distributing pipe (771) and the 4th oil distributing pipe (762) and the 6th oil distributing pipe (772), and depression bar oil cylinder (34) and handling oil cylinder (5) loculus are communicated with.
3. a kind of engineering driller drilling rod according to claim 1; It is characterized in that said depression bar oil cylinder (34) and handling oil cylinder (5) control loop also are included in the oil return pipe (80) that hand-operated direction valve (74) outlet is connected and are back to second overflow valve of installing on hydraulic oil container (70) pipeline (83); And first overflow valve of on big chamber to hydraulic oil container (70) pipeline of two handling oil cylinders (5), installing (82), with set pressure.
4. a kind of engineering driller drilling rod according to claim 2; It is characterized in that said two depression bar oil cylinders (34) are in big chamber during pressurized; Depression bar (33) stretches out cylinder (314) and pushes down drilling rod retainer plate (4), opens second one way valve (76) that is arranged in depression bar oil cylinder (34) simultaneously, and hydraulic oil flow is to the loculus of two handling oil cylinders (5); The piston rod (52) of handling oil cylinder (5) shrinks tension and compression frame (3) down, so that drilling rod (2) is in the pressurized state that creeps into downwards.
5. a kind of engineering driller drilling rod according to claim 2; It is characterized in that said two handling oil cylinders (5) in big chamber during pressurized, the piston rod (52) of handling oil cylinder (5) stretches out the top, the loculus of hydraulic oil two depression bar oil cylinders of entering (34); The piston rod of depression bar oil cylinder (34) shrinks; Depression bar (33) retraction cylinder (314) breaks away from drilling rod retainer plate (4), to pressing frame (3) release pressure, so that drilling rod (2) is in the normal condition of creeping into downwards.
6. a kind of engineering driller drilling rod according to claim 1 is characterized in that being provided with in the hole of said actuating sleeve (11) the torsion pass bar (111) of even layout, and drilling rod (2) bottom cylindrical is provided with the groove (22) with torsion pass bar (111) relative engagement.
7. a kind of engineering driller drilling rod according to claim 1 is characterized in that the head of said depression bar (33) is provided with breach (331), and breach when stretching out (331) is pressed in the upper surface of drilling rod retainer plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110167131.5A CN102839919B (en) | 2011-06-21 | 2011-06-21 | A kind of engineering driller drilling rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110167131.5A CN102839919B (en) | 2011-06-21 | 2011-06-21 | A kind of engineering driller drilling rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102839919A true CN102839919A (en) | 2012-12-26 |
| CN102839919B CN102839919B (en) | 2016-05-04 |
Family
ID=47367611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110167131.5A Expired - Fee Related CN102839919B (en) | 2011-06-21 | 2011-06-21 | A kind of engineering driller drilling rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102839919B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3802057A (en) * | 1970-09-24 | 1974-04-09 | Robbins J Ass Inc | Method for loosening threaded pipe connections using an earth drilling machine |
| CN1429308A (en) * | 2000-03-15 | 2003-07-09 | 弗米尔制造公司 | Directional drilling machine and method of directional drilling |
| CN201103342Y (en) * | 2007-11-29 | 2008-08-20 | 罗师竹 | Shallow-stratum drilling machine |
| CN101575943A (en) * | 2009-06-08 | 2009-11-11 | 重庆勤牛工程机械有限责任公司 | Hydraulic high-speed drill |
-
2011
- 2011-06-21 CN CN201110167131.5A patent/CN102839919B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3802057A (en) * | 1970-09-24 | 1974-04-09 | Robbins J Ass Inc | Method for loosening threaded pipe connections using an earth drilling machine |
| CN1429308A (en) * | 2000-03-15 | 2003-07-09 | 弗米尔制造公司 | Directional drilling machine and method of directional drilling |
| CN201103342Y (en) * | 2007-11-29 | 2008-08-20 | 罗师竹 | Shallow-stratum drilling machine |
| CN101575943A (en) * | 2009-06-08 | 2009-11-11 | 重庆勤牛工程机械有限责任公司 | Hydraulic high-speed drill |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102839919B (en) | 2016-05-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2863292C (en) | A method and an apparatus for retrieving a tubing from a well | |
| EP2494142B1 (en) | Subsea grease system and method of operating said system | |
| CN201241664Y (en) | Pipe column for jet pump oil extraction and water injection integrated process | |
| CN202321556U (en) | Integral translation device for drilling machine | |
| CN101228334A (en) | Apparatus and method for driving casing or conductor pipe | |
| CN102216552A (en) | Drilling apparatus | |
| CN201165658Y (en) | Walking type drill platform for cienaga and mudflat areas | |
| CN201202447Y (en) | Composite concentric tube column for liquor drainage gas production process | |
| CN202117583U (en) | Compression mechanism for drill rod of engineering driller | |
| CN112112863B (en) | Tandem hydraulic splitting device | |
| CN206928922U (en) | Gradually deblocking is segmented releasing tool | |
| CN201386505Y (en) | Novel valve-type difunctional hydraulic impactor | |
| CN102839919A (en) | Drill pipe of engineering driller | |
| CN214944160U (en) | Lifting type booster reversing valve | |
| CN111764870B (en) | Offshore oilfield throwing and fishing hydraulic drive reciprocating pump lifting device and operation method thereof | |
| CN201288500Y (en) | Rotary drilling hydraulic power head with vibrator | |
| CN113914824B (en) | Underground follow-up sealing production increasing pipe column capable of flushing well and efficient lifting method | |
| CN211666680U (en) | Blowout preventer for rod-drive screw pump oil production system | |
| CN105840092A (en) | Rotary drilling machine double-column structure | |
| CN204532133U (en) | A kind of piston type intelligent conversion joint | |
| CN201982010U (en) | Ground compressing device | |
| CN101769141B (en) | Localization hot washing device | |
| CN107060677B (en) | Oil gas reservoir acidizing is low frequency hydraulic pulsation generating device in pit | |
| CN202227983U (en) | High-stand engineering drilling machine | |
| CN106522205B (en) | A kind of pile cover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160504 Termination date: 20160621 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |